Toast工具

    函数 案例 结果
    toast(content: String?) toast(“xxx”)
    assertNoToast(content: String?): Boolean private var data: Int? = null
    private fun checkData(): Boolean {
    if (data == null) return assertNoToast(“xxx”)
    return true
    }    		 private fun sendData() {
    if (!checkData()) return
    // TODO send data
    }